What is root pressure

Root pressure
Water is "pressed" (presumably with the use of energy) into the central cylinder of the root. The root pressure supports the water transport within the plant. Proof of the existence of such a mechanism is the fact that (especially in spring) so-called "bleeding sap" escapes from the lower interface of cut trees - it is also said that the tree "bleeds". Since this liquid (the "bleeding sap") escapes a long time after the tree has been cut, the perspiration suction cannot be the cause of the "bleeding".
There are relatively many ions in the escaping liquid. The root pressure can be up to 6 bar.

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Last update: 02/18/2013

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